Why Cannot I access my website on my apache2 server? - apache2

Question

On an apache2 server, I recently cloned an app 'MyApp' from github. But I'm not able to access it through url 133.29.22.57/MyApp/ (ip address is dummy) ? I have tried setting permissions for /var/www/ folder to 777, I also created a new file myapp.conf in etc/apache2/sites-available/ , then I used a2ensite to make it live, then restarted server but still can't access the site. Please help.
Here are the contents of my myapp.conf file :
<VirtualHost *:80>
ServerAdmin webmaster#localhost
DocumentRoot /var/www/MyApp/
<Directory /var/www/MyApp/>
Options Indexes FollowSymLinks
AllowOverride All
Require all granted
</Directory>
ErrorLog ${APACHE_LOG_DIR}/error.log
CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>
Some (possibly) relevant info from apache2.conf
Mutex file:${APACHE_LOCK_DIR} default
# These need to be set in /etc/apache2/envvars
User ${APACHE_RUN_USER}
Group ${APACHE_RUN_GROUP}
#
<Directory />
Options FollowSymLinks
AllowOverride None
Require all denied
</Directory>
<Directory /usr/share>
AllowOverride None
Require all granted
</Directory>
<Directory /var/www/>
Options Indexes FollowSymLinks
AllowOverride None
Require all granted
</Directory>
AccessFileName .htaccess
IncludeOptional conf-enabled/*.conf
# Include the virtual host configurations:
IncludeOptional sites-enabled/*.conf
UPDATE
some of the content that you may find relevant which I found under /var/log/apache2/access.log...
169.149.128.75 - - [20/Mar/2017:12:30:49 +0000] "GET /MyApp HTTP/1.1" 404 497 "-" "Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36"
169.149.128.75 - - [20/Mar/2017:12:31:01 +0000] "GET /MyApp/index.php HTTP/1.1" 404 507 "-" "Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36"
169.149.128.75 - - [20/Mar/2017:12:31:05 +0000] "GET /MyApp/index.php HTTP/1.1" 404 506 "-" "Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36"
169.149.128.75 - - [20/Mar/2017:12:31:40 +0000] "GET /MyApp/index.php HTTP/1.1" 404 507 "-" "Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36"
::1 - - [20/Mar/2017:12:36:02 +0000] "OPTIONS * HTTP/1.0" 200 125 "-" "Apache/2.4.7 (Ubuntu) PHP/5.5.9-1ubuntu4.21 (internal dummy connection)"
moreover,
I tried running command /usr/sbin/apache2 -V | grep SERVER_CONFIG_FILE
which says that the following variables are not defined :
${APACHE_LOCK_DIR} ${APACHE_PID_FILE } ${APACHE_RUN_GROUP } ${APACHE_LOG_DIR}

Answer 1

Setting permissions for /var/www/ folder to 777 is a very bad habit.
Give the directory (recursive) to the web server user, usually www-data like "chown -R www-data:www-data /var/www"
Then do a separated log, something like "mywebsite.error.log" and "mywebsite.access.log" so you'll be able to see quickly what's going on.
ErrorLog ${APACHE_LOG_DIR}/mywebsite.error.log
CustomLog ${APACHE_LOG_DIR}/mywebsite.access.log combined
Then tell us more precisely what's going on and I'll update my answer.